We have now lived in Whitby for going on 5 years and don't really hear the gulls most of the time. For the last 3 years parent gulls have been bringing their offspring onto our kitchen roof to learn how to fly, often leaving them all day. The youngsters' cry sounds like a cross between a cat and a child, but as already said we don't hear it unless we are specifically listening for them. Fortunately they are collected by the parent at the end of the day and so are not left crying overnight. We don't really understand how the young birds get onto the roof as when they are alone they will not fly, maybe it is just a confidence thing that they only fly when mum is close by.